svn-gvsig-desktop / trunk / libraries / libFMap / src / com / iver / cit / gvsig / fmap / operations / strategies / QueryByPointVisitor.java @ 6535
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| 1 | 1100 | fjp | /* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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| 2 | *
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| 3 | * Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.
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| 4 | *
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| 5 | * This program is free software; you can redistribute it and/or
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| 6 | * modify it under the terms of the GNU General Public License
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| 7 | * as published by the Free Software Foundation; either version 2
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| 8 | * of the License, or (at your option) any later version.
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| 9 | *
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| 10 | * This program is distributed in the hope that it will be useful,
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| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 13 | * GNU General Public License for more details.
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| 14 | *
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| 15 | * You should have received a copy of the GNU General Public License
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| 16 | * along with this program; if not, write to the Free Software
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| 17 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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| 18 | *
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| 19 | * For more information, contact:
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| 20 | *
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| 21 | * Generalitat Valenciana
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| 22 | * Conselleria d'Infraestructures i Transport
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| 23 | * Av. Blasco Ib??ez, 50
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| 24 | * 46010 VALENCIA
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| 25 | * SPAIN
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| 26 | *
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| 27 | * +34 963862235
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| 28 | * gvsig@gva.es
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| 29 | * www.gvsig.gva.es
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| 30 | *
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| 31 | * or
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| 32 | *
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| 33 | * IVER T.I. S.A
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| 34 | * Salamanca 50
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| 35 | * 46005 Valencia
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| 36 | * Spain
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| 37 | *
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| 38 | * +34 963163400
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| 39 | * dac@iver.es
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| 40 | */
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| 41 | 214 | fernando | package com.iver.cit.gvsig.fmap.operations.strategies; |
| 42 | |||
| 43 | 5317 | fjp | import java.awt.geom.Point2D; |
| 44 | import java.awt.geom.Rectangle2D; |
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| 45 | |||
| 46 | 305 | fjp | import com.iver.cit.gvsig.fmap.core.IGeometry; |
| 47 | 683 | fernando | import com.iver.cit.gvsig.fmap.layers.FBitSet; |
| 48 | 229 | vcaballero | import com.iver.cit.gvsig.fmap.layers.FLayer; |
| 49 | 214 | fernando | |
| 50 | 229 | vcaballero | |
| 51 | /**
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| 52 | * Query by point Visitor.
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| 53 | *
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| 54 | * @author Vicente Caballero Navarro
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| 55 | */
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| 56 | public class QueryByPointVisitor implements FeatureVisitor { |
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| 57 | 1034 | vcaballero | private Point2D point = null; |
| 58 | private double tolerance; |
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| 59 | private FLayer layer = null; |
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| 60 | private FBitSet bitset = null; |
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| 61 | private Rectangle2D recPoint = null; |
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| 62 | 1295 | fjp | // private ICoordTrans ct = null;
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| 63 | 990 | fjp | |
| 64 | 1034 | vcaballero | /**
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| 65 | * Devuelve un FBitSet con los ?ndices de los registros de la consulta.
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| 66 | *
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| 67 | * @return FBitSet con los ?ndices de la consulta.
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| 68 | */
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| 69 | public FBitSet getBitSet() {
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| 70 | return bitset;
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| 71 | } |
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| 72 | 214 | fernando | |
| 73 | 1034 | vcaballero | /**
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| 74 | * DOCUMENT ME!
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| 75 | *
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| 76 | * @param layer DOCUMENT ME!
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| 77 | */
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| 78 | public void setLayer(FLayer layer) { |
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| 79 | this.layer = layer;
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| 80 | 1295 | fjp | // this.ct = layer.getCoordTrans();
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| 81 | 1034 | vcaballero | } |
| 82 | 214 | fernando | |
| 83 | 1034 | vcaballero | /**
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| 84 | * Inserta la tolerancia que se aplica en la selecci?n.
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| 85 | *
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| 86 | * @param t tolerancia.
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| 87 | */
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| 88 | public void setTolerance(double t) { |
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| 89 | tolerance = t; |
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| 90 | } |
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| 91 | 990 | fjp | |
| 92 | 1034 | vcaballero | /**
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| 93 | * Inserta el punto de consulta.
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| 94 | *
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| 95 | * @param p punto de consulta.
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| 96 | */
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| 97 | public void setQueriedPoint(Point2D p) { |
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| 98 | point = p; |
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| 99 | } |
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| 100 | 214 | fernando | |
| 101 | 1034 | vcaballero | /**
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| 102 | * @see com.iver.cit.gvsig.fmap.operations.strategies.FeatureVisitor#visit(com.iver.cit.gvsig.fmap.core.IGeometry,
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| 103 | * int)
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| 104 | */
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| 105 | public void visit(IGeometry g, int index) { |
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| 106 | 1151 | vcaballero | if (g==null)return; |
| 107 | 1295 | fjp | /* if (ct != null) {
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| 108 | 1034 | vcaballero | g.reProject(ct);
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| 109 | 1295 | fjp | } */
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| 110 | 1151 | vcaballero | |
| 111 | 1034 | vcaballero | if (g.intersects(recPoint)) {
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| 112 | bitset.set(index, true);
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| 113 | } else {
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| 114 | bitset.set(index, false);
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| 115 | } |
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| 116 | } |
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| 117 | |||
| 118 | /**
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| 119 | * @see com.iver.cit.gvsig.fmap.operations.strategies.FeatureVisitor#stop()
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| 120 | */
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| 121 | public void stop(FLayer layer) { |
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| 122 | } |
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| 123 | |||
| 124 | /**
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| 125 | * @see com.iver.cit.gvsig.fmap.operations.strategies.FeatureVisitor#start()
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| 126 | */
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| 127 | public boolean start(FLayer layer) { |
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| 128 | bitset = new FBitSet();
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| 129 | recPoint = new Rectangle2D.Double(point.getX() - (tolerance / 2), |
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| 130 | point.getY() - (tolerance / 2), tolerance, tolerance);
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| 131 | |||
| 132 | return true; |
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| 133 | } |
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| 134 | 4311 | azabala | |
| 135 | public String getProcessDescription() { |
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| 136 | return "Selecting geometries that intersects a point"; |
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| 137 | } |
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| 138 | 214 | fernando | } |